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The Historic National Road: America's First Highway - Visit Maryland
The Historic National Road: A Delightful Maryland Drive
Maryland History - National Road Heritage Foundation
The Road in Maryland - National Road Heritage Foundation
Old Historical City, County and State Maps of Maryland
Maryland’s Historic National Road | Capital Region USA
Historic Bridges of Maryland - MDOT SHA
Drive the Historic National Road | How to Travel Around Frederick
Maps & Atlases – Maryland Center for History and Culture